indexo.dev

dfn-cert.de

.de crawl

First seen 2026-04-16 · Last seen 2026-05-14 · ok HTTP/1.1 200 2369 ms crawled 2026-05-11

DE · 193.174.13.92 · AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
DFN-CERT Services GmbH
Description
Forschung, Beratung und Dienstleistung für mehr Sicherheit im Internet
Language
de

Technology

Server
Apache
CMS
Gatsby

Third-party hosts loaded (1)

  • infosec.exchange×1

Social

Registration

Updated
2015-03-10
Name servers
  • deneb.dfn.de.
  • dns1.rrz.uni-hamburg.de.
  • dns2.rrz.uni-hamburg.de.
  • robin.dfn-cert.de.
  • rzdspc1.informatik.uni-hamburg.de.

DNS records live

NS
  • deneb.dfn.de
  • dns1.rrz.uni-hamburg.de
  • dns2.rrz.uni-hamburg.de
  • robin.dfn-cert.de
  • rzdspc1.informatik.uni-hamburg.de
MX
  • 100 mail1.dfn-cert.de
  • 50 mail2.dfn-cert.de

Email authentication weak

SPF
v=spf1 include:_spf.dfn-cert.de ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

GEANT TLS RSA 1
from 2025-12-15 to 2026-12-15
Expires in 208 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://www.dfn-cert.de/

present
  • strict-transport-security
  • x-frame-options
  • x-content-type-options
  • referrer-policy
findings
  • missing Content Security Policy
  • missing Permissions Policy
Header values
referrer-policy
no-referrer
x-frame-options
SAMEORIGIN
x-content-type-options
nosniff
strict-transport-security
max-age=15768000

Links to (5)

Linked from (1)